|Short description:||Rousseau's 'Emile'|
|Medium description:||Jean-Jaques Rousseau's 'Emile' published.|
According to Barnard (1961) stated that:
- education should be "accommodated to the various stages of the child's development"
- up to the 12th year no formal instruction should be given
- the intellectual development of the child is divided into 3 distinct periods